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