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