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