くびを かしげながら とを あけろと そこには ぬけるように いろのしろい うつくしい むすめが たっておった。
I have translated it as:
Inclining his head, he opened the door, and beautiful woman in white color stood there, so that she came out from inside.
But I am not sure about ぬけるように. In fact, i have translated it as "clause of result" i.e. woman have came out from inside because, she was there. Maybe i did mistake.