We don’t have multi bits available in the graph widget iirc. You could just use the standard image widget and use the full url to the image you want.
As an example, a graph url for storage for me is: graph.php?id=388&type=storage_usage&to=-300&from=-6h&height=300&width=1512 so I could just use that in the image url. Make sure you change the to + from to values you want to see, by default the graph url will be hardcoded with a particular datetime. However in my example you can see I’ve said the graph should start -6 hours ago up until -300 seconds.