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