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