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