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