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