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