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