I want to print a Boost Graph having custom(string) vertex labels instead of the default vertex numbering label 0,1,2...

I have initialized the graph as :

typedef adjacency_list <vecS, vecS, directedS, property<vertex_name_t,string>> Graph;

Graph g;
set<string> names;
map<string,Graph::vertex_descriptor> vertex ;

for(auto it = names.begin() ; it != names.end(); ++it )
       vertex[*it] =  add_vertex(*it,g) ;

Now how should I print this graph such that I get edges of the form abc -> xyz; instead of 1->2;