If you want only the graph, without any reference to the title texts, one way is to create a journal of only the parts you would like. You can then print the journal.
// Example.
bigClass = Open( "$SAMPLE_DATA/Big Class.jmp" );
var = bigClass << Variability Chart( Y( :height ), X( :age ) );
rvar = var << Report; // Create display box reference.
graph = rvar[List Box( 2 )]; // Create graph reference.
graph << Select;
graph << Journal;
graph << Deselect;