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