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