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