As said Neilfws you need pairwise information, e.g.
-a tab separeted text file like this
gene1 interaction gene2 ABC1 2 BRCA2 ABC1 2 BRCA1 BRCA2 2 XRCC1
-a tool for graph visualization (e.g. cytoscape, graphviz...). In cytoscape you should import a new network from table/csv and setup source (gene1), destination (gene2) and interaction type (interaction) column from the wizard.
-look at the graph
p.s. I suggest at least reading the good cytoscape tutorial