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