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