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