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