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)(11,12)(18,20)(22,23) involution — undirected(2,6)(3,8)(9,10,14,13)(11,16,12,15)(17,18,21,20)(19,23,24,22)(2,6)(4,7)(9,11,14,12)(10,15,13,16)(17,19,21,24)(18,22,20,23)(1,3)(2,7)(4,6)(5,8)(9,12,14,11)(10,16,13,15)(17,20,21,18)(19,23,24,22)(1,3)(2,7)(4,6)(5,8)(9,13,14,10)(11,16,12,15)(1,4,5,7)(2,3,6,8)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.