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