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