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