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