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