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