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