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