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