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