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