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