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)(15,23)(16,21)(17,20)(18,22)(19,25)(24,28)(26,27)(1,2,4,3)(5,7)(6,9)(8,12)(10,11)(15,24)(19,27)(23,28)(25,26)(1,3,4,2)(13,15)(14,19)(16,25)(17,26)(18,24)(20,23)(21,28)(22,27)(7,12)(9,11)(13,16,18,17)(14,20,22,21)(15,25,24,26)(19,23,27,28)(6,10)(9,11)(13,16,18,17)(14,21,22,20)(15,25,24,26)(19,28,27,23)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.