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