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