documentclass{article}
usepackage{tikz}
begin{document}
begin{tikzpicture}
def n {5}
def radius {3cm}
def margin {8} % margin in angles, depends on the radius

foreach s in {1,...,n}
{
  node[draw, circle] at ({360/n * (s - 1)}:radius) {$s$};
  draw[->, >=latex] ({360/n * (s - 1)+margin}:radius)
    arc ({360/n * (s - 1)+margin}:{360/n * (s)-margin}:radius);
}
end{tikzpicture}
end{document}

documentclass{standalone}
usepackage{tikz}
begin{document}
begin{tikzpicture}
def n {5}
def radius {3cm}
def margin {12} % margin in angles, depends on the radius

foreach s in {1,...,n}
{
  node[draw, circle] at ({360/n * (s - 1)}:radius) {$s-1$};
  draw[->, >=latex] ({360/n * (s - 1)+margin}:radius)
    arc ({360/n * (s - 1)+margin}:{360/n * (s)-margin}:radius);
}
end{tikzpicture}
end{document}