[r-t] Cayley graphs of doubles extents

[Alexander Holroyd]

I don't know how to put it on a truncated icosahedron.  Where are the
generators?  (Not on the edges of the solid, certainly, since it has
pentagonal faces...)

I'm certainly intending to draw stedman, grandsire, plain bob etc (perhaps
with all the other edges faintly visible).

One could also make a 3D model.  I suggest making the quadrilateral faces
(which form 20 hexagonal prisms) out of paper, and leaving the hexagonas
out.

> Can you put the vertices for the in-course extent on a truncated
> icosahedron to show the symmetry? And display just the edges that
> correspond to a particular touch? I'd like to see Stedman like this.