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