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)(15,20)(16,22)(17,26)(18,23)(19,21)(24,27)(25,28)(1,2,3,4)(13,15,19,24)(14,20,21,27)(16,23,26,28)(17,25,22,18)(5,7,9,12)(6,10,11,8)(14,21)(15,24)(16,26)(18,25)(5,7)(6,8)(9,12)(10,11)(13,16,19,26)(14,22,21,17)(15,23,24,28)(18,27,25,20)(5,8)(6,7)(9,10)(11,12)(13,17,19,22)(14,16,21,26)(15,25,24,18)(20,23,27,28)(13,18,19,25)(14,23,21,28)(15,22,24,17)(16,27,26,20)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.