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