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