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