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