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