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