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