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