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