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