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