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