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