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