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