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