The Kaddish is said standing with your feet together. Before the last paragraph, take three steps back. Now comes the bowing procedure, like this:
Bow slightly to the right and say: Oseh shalom bim-ro-mov
Bow slightly straight ahead and say: Hoo
Bow slightly to the left and say: Ya’aseh shalom aleinu
Bow slightly straight ahead and say: V’al kol yisrael ve-imru amen
(This reflects Chabad practice. Others have different customs.)