I use the DragNode chart for representing relations between different objects. The generated image contains only text, the connectors and colors are not present.
For the export I use this code :
function FC_Rendered(objRtn){
var myChart = getChartFromId(objRtn);
myChart.exportChart( {
exportFormat : "JPG",
exportAtClient : 0,
exportFileName : "mychart",
exportAction : "save",
exportHandler : "includes/powercharts/ExportHandlers/PHP/FCExporter.php" });
}