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