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