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