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