Thanks for suggestion. But my csv is based on the documents which has node_id and edges in the same document. But the tool which you suggested looks like asking for two different entries for nodes separately and edges separately.
My documents looks like this node_id, in_edges_ss ( multi value field ), out_edges_ss ( multi value field ), document name, document field1, document field2, document field3..... document field n
Let me know is that possible to create graph in that tool for this document model ?