\documentclass[varwidth=true, border=2pt]{standalone}
\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage[margin=2.5cm]{geometry} %layout

\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}

\begin{document}
\tikzset{mark options={line width=0.5pt}}
\begin{tikzpicture}
    \begin{axis}[
            width=7.5cm, height=15cm,     % size of the image
            enlarge x limits=0.05,
            enlarge y limits=0.05,
            xmin = -5,
            xmax = 5,
            ymin = -10,
            ymax = 10,
            % xlabel=x,
            % ylabel=y
         ]
          \addplot[scatter,
                   only marks,
                   mark=*,
                   mark size = 1,
                   point meta=1,
                   ]
                   table [x=x, y=y, col sep=comma] {data.csv};
    \end{axis}
\end{tikzpicture}
\end{document}