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)(15,21)(16,23)(17,20)(18,19)(22,25)(24,28)(26,27)(30,34)(31,37)(32,40)(43,44)(7,11)(10,12)(14,19)(16,21)(20,27)(24,25)(29,30,33,34)(31,38,37,35)(32,36,40,42)(39,44,41,43)(5,6,8,9)(7,10,11,12)(13,15)(14,16)(17,22)(18,23)(19,21)(20,24)(25,27)(26,28)(29,30)(31,35)(32,36)(33,34)(37,38)(39,43)(40,42)(41,44)(1,2)(3,4)(5,7,8,11)(6,10,9,12)(13,16)(14,15)(17,25)(18,21)(19,23)(20,28)(22,27)(24,26)(29,31,33,37)(30,35,34,38)(32,41,40,39)(36,44,42,43)(13,17,18,26)(14,20,19,27)(15,22,23,28)(16,24,21,25)(29,32,33,40)(30,36,34,42)(31,39,37,41)(35,43,38,44)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.