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