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