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