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