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