One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(13,14)(15,24)(16,21)(17,22)(18,32)(19,23)(20,26)(25,39)(27,35)(28,34)(29,36)(30,37)(31,38)(33,41)(40,43)(42,44)(5,6)(7,10)(8,9)(11,12)(13,15,17,27,19,28,18,26)(14,20,32,34,23,35,22,24)(16,25,30,40,31,42,29,41)(21,33,36,44,38,43,37,39)(2,4)(6,9)(10,12)(13,16,19,31)(14,21,23,38)(15,25,28,42)(17,30,18,29)(20,33,35,43)(22,37,32,36)(24,39,34,44)(26,41,27,40)(5,7)(6,10)(8,11)(9,12)(13,17,19,18)(14,22,23,32)(15,26,28,27)(16,29,31,30)(20,34,35,24)(21,36,38,37)(25,40,42,41)(33,39,43,44)(7,11)(10,12)(13,17,19,18)(14,22,23,32)(15,27,28,26)(16,30,31,29)(20,24,35,34)(21,37,38,36)(25,40,42,41)(33,39,43,44)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.