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