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