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