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