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