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