I want to make this new group not visible for the "settings" group.

How can I do that with that code?

<record id="group_customer_supplier_manager" model="res.groups">
       <field name="name">approval</field>
   <field name="domain">[('user_id','=',11)]</field>
   <field name="groups">base.group_system</field>
   <field name="users" eval="[(4, ref('base.group_system'))]"/>
       <field name="category_id" ref="base.module_category_extra" />
   </record>

Thank you