The PBG diagram is for a 3-way blade switch, whereas yours is a 3-way toggle.
This diagram is better match for your build, but it doesn't really matter.
Hopefully this helps:
The rest of the connections appear to be OK, but I can't see all the lugs on the volume pot to be certain. Don't worry about the 'spare' blue wire.
The black ground wire from the jack is going to the back of the volume pot and then to the back of the tone pot. The grey wire is going from the back of the volume pot to the ground lug on the switch. Thus both pots and the switch have a ground connection to the jack. The red wire from the jack is your signal 'hot' which goes to the lug on the volume pot. The purple is the 'hot' output from the switch to the other lug on the volume pot, and then another red links this to your tone pot. Make sense?