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