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