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