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