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