code: def __draw_clusters(self):
          
          data = self.__directory.get_data()
          for index_cluster in range(len(self.__clusters)):
              color = color_list.get_color(index_cluster)
              self.__draw_cluster(data, self.__clusters[index_cluster], color, '.')
  
          self.__draw_cluster(self.__directory.get_data(), self.__noise, 'gray', 'x')
docs: !
          @brief Display clusters and outliers using different colors.