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