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