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