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