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