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