Two goals from Fraizer Campbell saw Cardiff open up an eight-point gap at the top of the table but Wolves have now gone 11 Championship matches without a win to leave them third from bottom.
Saunders has picked up just four points in his first eight games in charge of the club and he blamed defensive errors and bad miss by Sylvan Ebanks-Blake late on for the latest defeat.
Saunders said: "There were a lot of positives to take out of the game but we made two catastrophic mistakes.
"We conceded a goal from a long throw and to make matters worse I had walked the players through that before the game and shown them on the DVD.
"It was one of those goals that keeps you awake as a manager. Then we conceded from another mistake and I think (keeper) Carl Ikeme will be the first to hold his hands up because nine times out of 10 he usually comes and catches that.
"But we managed to reply straight away and then Sylvan misses an open goal for two-all.
"At the minute it is just not going for us. They are fighting, though, and determination is the biggest thing that you need - not tactics or team selection.
"You know all the players and you think surely we must have enough, but they are not getting results. We need a scruffy win as soon as we can.
"Some of the players have kept having punches on the chin for the last two-and-a-half years and some of them look a bit jaded from it all.
"We have got to win five or six games and I think there is enough in the dressing room, but we might have to do something else (sign a player on loan) and if I can I will."