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