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