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