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