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