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