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