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