Use VBA code to get the current day of the week, then you can use a series of if statements (or a select statement which is more efficient and better form, but not my personal style) to call the appropriate query.
in pseudocode:
If TodayIsSunday then
DoCmd.OpenQuery "SundayQuery"
elseif TodayIsMonday then
DoCmd.OpenQuery "MondayQuery"
...
End If
I forget which function returns the current day of the week. I'm thinking DatePart or something like that, but I may be way off. Check the help files for that part.
Good luck.