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