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