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