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