How can I style my hair like this?

Blast dry your hair till almost dry, finish drying using a flat paddle brush to smooth down hair (you don't want any frizz) put your hair into large velcro rollers and spray with a setting agent eg. hairspray, leave for a while maybe while you are getting ready to go out.(you could also use heated rollers it's your choice) take rollers out and gently trace your fingers through the curls to accentuate the volume and wave. finish with some gel spray maybe to hold. I hope this was of some help to you.