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