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