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