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