One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(13,16)(17,18)(19,22)(20,23)(21,25)(24,29)(26,30)(27,32)(28,31) involution — undirected(2,5)(3,8)(6,7)(9,10)(11,13)(12,14)(15,16)(17,19,21,27)(18,22,25,32)(20,28,29,26)(23,31,24,30)(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,15)(14,16)(18,23)(20,29)(22,30)(24,25)(26,28)(31,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.