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)(17,24)(18,21) involution — undirected(1,2)(3,4)(5,6)(7,8)(9,10,13,15,14,17,22,24)(11,16,18,23,19,12,21,20)(6,8)(9,11,14,19)(10,16,17,12)(13,18,22,21)(15,23,24,20)(2,4)(6,8)(10,17)(11,19)(15,24)(18,21) involution — undirected(9,12,13,20,14,16,22,23)(10,18,15,19,17,21,24,11)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.