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