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