With help of following actions, you can make the graphical interface on the needed taxonomy page:
add_action("{$taxonomy}_edit_form", "foo_add_taxonomy_meta_boxes", 10, 2); // Edit taxonomy page
add_action("{$taxonomy}_add_form_fields", "foo_add_taxonomy_meta_boxes_2"); // Add taxonomy page (basicaly where you can list all of them)
add_action("edit_{$taxonomy}", "foo_save_taxonomy_meta", 10, 2); // Editing existing one, be carefull as it runs also in quick edit
add_action("create_{$taxonomy}","foo_save_taxonomy_meta", 10, 2); // Creating new taxonomy
add_action("delete_{$taxonomy}", "foo_delete_taxonomy_meta", 10, 3); // Deleting a taxonomy, you should always clean up after yourself
