Origin provides multiple ways to plot data by different groups. Which way to choose depends on how your data is arranged and what kind of graph you want to plot.
group info in column header row
menu Plot> 2D: Multi-Panel: Multiple Panels by Label....
Multiple Panels by Label Graph
group info in column(s)
menu Plot> 2D: Cluster Plot
menu Plot> 2D: Trellis Plot
menu Plot> 2D: Bar: Grouped Column - Indexed data
menu Plot> 2D: Group Box: Grouped Box chart - Indexed data