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