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