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