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