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