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