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)(15,19)(16,23)(17,26)(18,21)(20,24)(22,28)(25,27)(1,2)(3,4)(5,6)(7,10)(8,9)(11,12)(13,15,18,17)(14,19,21,26)(16,22,25,24)(20,23,28,27)(2,4)(6,9)(10,11)(13,16,17,24,18,25,15,22)(14,20,19,23,21,28,26,27)(5,7,8,12)(6,10,9,11)(2,4)(13,15,18,17)(14,19,21,26)(16,24,25,22)(20,27,28,23)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.