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