NL50: Calling range vs unknown who pushes first hand

[Sharagoz]

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $32.95
BB: $56.65
UTG: $23.40
CO: $1.75
Hero (BTN): $54.55

Preflop: Hero is dealt X X (5 Players)
UTG calls $0.50, CO folds, <font color="red">Hero raises to $2.50</font>, <font color="red">SB raises all-in to $32.95</font>

Here's what happened:
SB sat down one hand ago. Never played with him before.
The first hand he was BB and got a walk. Second hand I raise from BTN after UTG limps, SB insta shoves. NL50 players, what range do you call with here?