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