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