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