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