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