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)(17,26)(20,21)(22,27)(23,25)(24,28)(6,9)(7,11)(13,14,17,19,18,22,26,27)(15,20,23,21,16,24,25,28)(2,4)(5,6)(7,10)(8,9)(11,12)(13,15,18,16)(14,20,22,24)(17,23,26,25)(19,21,27,28)(6,9)(10,12)(13,16,18,15)(14,21,22,28)(17,23,26,25)(19,20,27,24)(5,7,8,11)(6,10,9,12)(14,22)(19,27)(20,24)(21,28)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.