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)(17,18)(21,28)(22,26)(23,24)(25,27)(6,9)(7,11)(13,14,18,20,19,24,17,23)(15,21,25,28,16,26,27,22)(2,4)(5,6)(7,10)(8,9)(11,12)(13,15,19,16)(14,21,24,26)(17,27,18,25)(20,28,23,22)(6,9)(10,12)(13,16,19,15)(14,22,24,28)(17,27,18,25)(20,26,23,21)(5,7,8,11)(6,10,9,12)(13,17,19,18)(14,23,24,20)(15,25,16,27)(21,28,26,22)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.