twice as fast as sixteenth notes and half as fast as sixety fourth notes
Seriously though how do you count them ?

one and a two and a three and a four and a <<that kinda thing.
oh, i believe its one e and a two e and a three e and a four e and a but maybe i am wrong
you know, i was going to post how to count it...i don't think there really is a way to count 32nd notes.
The only way i know how to do it is to count the sixtheenth notes, and double the speed.

Quarter notes=one, two, three, four.
eighth notes= one and two and three and four
16th notes= 1 E and A 2 E and A 3 E and A 4 E and A
32notes= no friggen clue...now i'm curious.
depends on the tempo, lets work with it like this..... on a tempo of 30 bpm, first set your metronome to 120 bpm...... then you would need to shove 16 notes together between clicks 1 & 2, 2 & 3, 3 & 4, 4 & 1....... that is the easiest way to explain it really (the reasoning is that the length of time is the same but you have more pulses to help keep you in time) or you could set it to 30 bpm (1 pulse every 2 seconds) and shove 64 notes inbetween each pulse.....