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