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