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