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