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