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