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