How to adjust the size of graphs in `graphs_list.show_graphs`

edit

The following code is used to find some cospectral graphs. I want to show it in pairs with a for-loop. But each line of the graphs looks too small and there is too much space between each pair of graphs. I want to show them in a beautiful way.

g=graphs.cospectral_graphs(6)
l=len(g)
for i in range(l): 
    print("The",i+1, "th pair cospectral graphs")
    graphs_list.show_graphs(g[i],vertex_size=200,figsize=100,vertex_labels=True,vertex_color='orange')

I tried another method. I put a frame around each graph (like the blue border above). But the frame for each graph is not is inconsistent (see in the following picture). (The reason for putting a frame around each graph is to better distinguish the different graphs)

g=graphs.cospectral_graphs(6)
l=len(g)
for i in range(l):               
    G=[plot(g[i][j],graph_border=True,edge_thickness=2, vertex_size=200,vertex_labels=True,vertex_color='orange') for j in range(len(g[i]))]
    print("The",i+1, "th pair cospectral graphs:")
    graphics_array(G).show(figsize=5)