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