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