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)(13,14,19,23)(15,24,26,22)(16,21,18,27)(17,20,25,28)(2,3)(5,7)(6,9)(8,11)(10,12)(13,15,18,17,19,26,16,25)(14,20,21,24,23,28,27,22)(1,2,4,3)(13,16,19,18)(14,21,23,27)(15,25,26,17)(20,24,28,22)(1,3,4,2)(7,11)(9,12)(15,26)(17,25)(20,28)(22,24)(13,17,18,26,19,25,16,15)(14,22,21,20,23,24,27,28)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.