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