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