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