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