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