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