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