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