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