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