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