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