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