One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10)(11,13)(12,14)(15,16)(17,18,20,23)(19,22,27,31)(21,24,29,30)(25,28,32,26)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,19,20,27)(18,22,23,31)(21,26,29,28)(24,25,30,32)(10,14)(13,16)(17,18)(19,25)(20,23)(21,30)(22,26)(24,29)(27,32)(28,31) involution — undirected(1,4,5,3)(2,6,7,8)(19,26)(21,29)(22,25)(24,30)(27,28)(31,32)(18,23)(22,31)(24,30)(25,32) 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.