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