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