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