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)(15,18,23,20)(16,24,25,26)(19,27,28,22)(1,2)(3,4)(6,10)(11,12)(13,15,17,23)(14,18,21,20)(16,22,25,27)(19,26,28,24)(2,4)(5,7,9,8)(6,11,10,12)(13,16,15,22,17,25,23,27)(14,19,20,24,21,28,18,26)(1,2)(3,4)(5,7,9,8)(6,11,10,12)(16,25)(19,28)(22,27)(24,26)(2,4)(5,8,9,7)(6,12,10,11)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.