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