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