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)(13,14,18,16)(15,22,26,20)(17,28,19,21)(23,25,24,27)(6,9)(10,12)(13,15,18,26)(14,20,16,22)(17,27,19,25)(21,23,28,24)(1,2,3,4)(13,14,18,16)(15,23,26,24)(17,21,19,28)(20,27,22,25)(13,16,18,14)(15,24,26,23)(17,28,19,21)(20,25,22,27)(5,7,8,11)(6,10,9,12)(13,17,18,19)(14,21,16,28)(15,25,26,27)(20,24,22,23)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.