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