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