You can draw load from the 33kV side but take note the current is much lesser and thinner wire compared to the secondary side.
Since it is a step down transformer the load side is the secondary, the 11 kV. Thus, it has thicker conductor in it (higher current rating) intended to handle a load.
In addition, you could not enjoy the full capacity of the transformer if you use the primary as the load side.
Anyway, the answer for your question is “YES”. :)