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