Complex sentence: Some gender benders identify with the gender assigned them at birth, but "challenge" the norms of that gender presentation through androgynous dress, adornment, behavior, and atypical gender roles.
Split into simpler sentences: Some gender benders identify with the sex assigned them at birth, but challenge the societal norms that assign expectations of particular, gendered behaviour to that sex. This rebellion can involve androgynous dress, adornment, behavior, and atypical gender roles.