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