Joseph is referring to point #3 in this post.
There isn’t one in vanilla Grasshopper. You may be able to get there by running a three dimensional voronoi and slicing the cells with planes, but I think you’ll have a hard time getting the facet edges to line up.
I think the best way forward is probably one of the many Grasshopper plugins which are suitable for creating planar tessellations. Kangaroo may work or possibly Mesh Machine, but I have to admit I’m not really up on what plugins do so I’m the wrong person to ask for that.