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