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