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