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