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