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