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