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