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