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)(11,13)(12,15)(14,16)(17,18)(19,28)(20,23)(21,31)(22,26)(24,27)(25,30)(29,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(10,11)(14,15)(17,19,24,30)(18,25,27,28)(20,26,21,32)(22,23,29,31)(1,2,4,6)(3,5,8,7)(9,10,13,11)(12,14,16,15)(17,20,24,21)(18,23,27,31)(19,26,30,32)(22,25,29,28)(1,3)(2,5)(4,8)(6,7)(9,11,13,10)(12,15,16,14)(17,21,24,20)(18,23,27,31)(19,26,30,32)(22,28,29,25)(1,3)(2,5)(4,8)(6,7)(9,12,13,16)(10,14,11,15)(17,22,24,29)(18,26,27,32)(19,23,30,31)(20,25,21,28)(1,2)(3,5)(4,6)(7,8)(17,23)(18,20)(19,29)(21,27)(22,30)(24,31)(25,26)(28,32) 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.