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