James Milner dispatched from the spot after Georginio Wijnaldum opened the scoring – but once again, the Bluebirds were left feeling hard done by.
With the game deadlocked, no penalty was awarded when Andy Robertson appeared to tug on Sean Morrison’s shirt in the Liverpool box.
However, the Cardiff skipper was punished for the same offence when Salah took a theatrical tumble late on.
“Once again, one or two things have gone against us, but I’m always like that, aren’t I?” Warnock told talkSPORT.
“There would be a lot of penalties in matches if you give things like that. It’s a soft penalty.
“At the end of the tugging, the theatrics of the dive were a solid 9.9. It’s a Tom Daley job, that.”