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