Sorting categorical labels in seaborn chart
Set the order parameter.
plot_income_cat_hours = sns.countplot(x='hours_per_week_grouping', hue='income-cat', data=data, order=['place the desired order here'])
You may try the following,
sns.countplot(data = data.sort_values(by="hours_per_week_grouping"), x= "hours_per_week_grouping", hue= "income-cat")