\begin{tikzpicture}[scale=1]
	\node (NW) at (-1,1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (NE) at (1,1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (SW) at (-1,-1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (SE) at (1,-1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (SfarE) at (3,-1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (SfarW) at (-3,-1) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (topW) at (-1,3) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (topE) at (1,3) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (topfarE) at (3,3) [rectangle,draw] {$\;\; \JW{3} \;\;$};
	\node (topfarW) at (-3,3) [rectangle,draw] {$\;\; \JW{3} \;\;$};

\begin{pgfonlayer}{background}	
	\draw (NW.-45) -- (SE.45);
	\draw (NW.-90) -- (SE.90);
	\draw (NW.-135) -- (SE.135);
	\draw[line width=4pt,white,opaque] (NE.-45) -- (SW.45);
	\draw[line width=4pt,white,opaque] (NE.-90) -- (SW.90);
	\draw[line width=4pt,white,opaque] (NE.-135) -- (SW.135);
	\draw (NE.-45) -- (SW.45);
	\draw (NE.-90) -- (SW.90);
	\draw (NE.-135) -- (SW.135);	
	
	\draw (topW.-45) -- (NE.45);
	\draw (topW.-90) -- (NE.90);
	\draw (topW.-135) -- (NE.135);
	\draw[line width=4pt,white,opaque] (topE.-45) -- (NW.45);
	\draw[line width=4pt,white,opaque] (topE.-90) -- (NW.90);
	\draw[line width=4pt,white,opaque] (topE.-135) -- (NW.135);
	\draw (topE.-45) -- (NW.45);
	\draw (topE.-90) -- (NW.90);
	\draw (topE.-135) -- (NW.135);	
\end{pgfonlayer}

	\draw (SE.-45) .. controls ++(-60:6mm) and ++(-120:6mm) .. (SfarE.-135);
	\draw (SE.-90) .. controls ++(-60:9mm) and ++(-120:9mm) .. (SfarE.-90);
	\draw (SE.-135) .. controls ++(-60:12mm) and ++(-120:12mm) .. (SfarE.-45);
	
	\draw (SfarW.-45) .. controls ++(-60:6mm) and ++(-120:6mm) .. (SW.-135);
	\draw (SfarW.-90) .. controls ++(-60:9mm) and ++(-120:9mm) .. (SW.-90);
	\draw (SfarW.-135) .. controls ++(-60:12mm) and ++(-120:12mm) .. (SW.-45);
	
	\draw (topE.45) .. controls ++(60:6mm) and ++(120:6mm) .. (topfarE.135);
	\draw (topE.90) .. controls ++(60:9mm) and ++(120:9mm) .. (topfarE.90);
	\draw (topE.135) .. controls ++(60:12mm) and ++(120:12mm) .. (topfarE.45);
	
	\draw (topfarW.45) .. controls ++(60:6mm) and ++(120:6mm) .. (topW.135);
	\draw (topfarW.90) .. controls ++(60:9mm) and ++(120:9mm) .. (topW.90);
	\draw (topfarW.135) .. controls ++(60:12mm) and ++(120:12mm) .. (topW.45);
	
	\draw (SfarW.45) -- (topfarW.-45);
	\draw (SfarW.90) -- (topfarW.-90);
	\draw (SfarW.135) -- (topfarW.-135);
	
	\draw (SfarE.45) -- (topfarE.-45);
	\draw (SfarE.90) -- (topfarE.-90);
	\draw (SfarE.135) -- (topfarE.-135);
	


\end{tikzpicture}