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