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