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