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