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