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)(15,20)(16,17)(18,19)(21,22)(23,26)(24,28)(25,27)(14,19)(17,20)(21,23,25,28)(22,26,27,24)(5,7,9,8)(6,10,12,11)(13,15,18,16)(14,20,19,17)(21,23)(22,24)(25,28)(26,27)(1,2)(3,4)(5,8,9,7)(6,11,12,10)(13,16,18,15)(14,20,19,17)(5,6)(7,10)(8,11)(9,12)(13,17,18,20)(14,16,19,15)(21,24)(22,23)(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.