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