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