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