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)(15,23)(16,22)(17,20)(18,21)(19,24)(25,28)(26,27)(2,3)(5,7)(6,9)(8,11)(10,12)(13,15,16,26,18,25,17,24)(14,19,20,28,21,27,22,23)(1,2,4,3)(13,16,18,17)(14,20,21,22)(15,24,25,26)(19,23,27,28)(1,3,4,2)(7,11)(9,12)(14,21)(19,27)(20,22)(23,28)(13,15,16,26,18,25,17,24)(14,19,20,28,21,27,22,23)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.