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