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