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