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