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