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