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