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