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