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