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