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