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