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