graph {
    rankdir=LR
    {
        rank=same;
        1 [ xlabel="0" ]; 3 [ xlabel="1" ];
    }
    {
        rank=same;
        2 [ xlabel="1" ]; 4 [ xlabel="1" ];
    }
    {
        rank=same;
        5 [ xlabel="2" ];
    }

    1 -- 2;
    1 -- 3;
    1 -- 4;
    2 -- 5;
    4 -- 5;

}