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