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