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