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