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