The churchyard at St John the Baptist Church has over 500 known graves in it.
If you want to locate a person who may be buried here, start by downloading this PDF file Aston Cantlow Graves which contains all known graves up to the current year.
That document lists the names of persons in the graves in each section of the churchyard and also the cremation plots. You should be able to search for a given name using your PDF file reader or you can just browse through the pages.
Having identified the relevant person, note down the relevant section, map letter and plot number. A map of the layout of the main churchyard plots is not available online as yet but is available for visitors in the church porch, but plots in the new extension, the tower cremation plots and the island cremation plots are shown below. Open the relevant map files below (stored in MS Word) to see the layout of each section, and the physical position of each plot.