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