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