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