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