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