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