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