I love that style...I have side swept bangs too and I used to do that a lot...
I used these:
http://www.u-handbag.com/images/hairclip…
what I did was I grabbed my bangs..pulled them back, slightly twisting the end to clip it to my head...it's not as poofy as that but it works...
I never quite mastered the whole poofy thing...I think if u tie a tiny rubber band around ur bangs after pulled them back...then clip ur bangs with one of those clips to make it poofier...and spray it..maybe??
im sorry if I confused you...hope I helped a little bit!!