。
How do you enjoy your free time?
Literal
Free-time [object-を] what-kind-of way [in-に] enjoy-[honorific-passive-れる]-[ongoing-ている]-[polite-ますか]?
A polite-to-honorific question. 楽しまれる is the ~れる/~られる honorific (sonkeigo light) on 楽しむ — not the plain passive here, because there's no agent; context makes clear it's respectful speech toward the listener. どんな風に ('in what way') is a common stock phrase for asking 'how.' The ~ている gives the question a habitual sense — 'how do you generally spend it,' not 'how are you spending it right now.'