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