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