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