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