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