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