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