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