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