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