One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,10)(8,9)(11,12)(14,19)(15,23)(18,21)(20,24)(25,27)(26,28) involution — undirected(1,2)(3,4)(6,9)(10,12)(13,14)(15,20)(16,21)(17,19)(18,22)(23,28)(24,27)(25,26) involution — undirected(2,4)(13,15,21,27,17,25,18,23)(14,20,16,24,19,26,22,28)(2,4)(13,16,17,22)(14,21,19,18)(15,24,25,28)(20,27,26,23)(5,7,8,11)(6,10,9,12)(14,19)(16,22)(20,26)(24,28)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.