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