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