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