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