The photographs show Ms Palin in Reno on Tuesday wearing the scarf emblazoned with donkeys and the words 'Yes' and 'Vote'.
The donkey has become the established political symbol for the Democratic Party. Republicans are most commonly associated with the elephant.
Mr McCain's running-mate was criticised yesterday after it was revealed the Republican Party splurged $150,000 (£92,000) on her wardrobe in September alone.
Under 'campaign accessories' figures show money was spent on Ms Palin's tailored jackets, pencil skirts and designer heels.
Nearly $50,000 was spent at Saks Fifth Avenue and nearly $5,000 on hair and makeup.
“With all of the important issues facing the country right now, it’s remarkable that we’re spending time talking about pantsuits and blouses,” a McCain spokeswoman said.
Palin's shopping list
* Saks Fifth Avenue: $49,425.74.
* Neiman Marcus: $75,062.63
* Macy's: $9,447.71
* Barneys New York: $789.72
* Bloomingdales: $5,102.71
* Hair and make-up: $4,716.49
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