I was able to find a way to change the color of the background when a cell is edited. here is the code I created, is this the correct way to do it?
Dim CellStyle As New Syncfusion.Windows.Forms.Grid.GridStyleInfo
Me.PivotGridControl1.TableModel.GetCellInfo(Me.PivotGridControl1.TableControl.CurrentCell.RowIndex, Me.PivotGridControl1.TableControl.CurrentCell.ColIndex, CellStyle)
CellStyle.BackColor = Color.AliceBlue
Dim MyType As Syncfusion.Styles.StyleModifyType
MyType = Syncfusion.Styles.StyleModifyType.Changes
Me.PivotGridControl1.TableModel.SetCellInfo(Me.PivotGridControl1.TableControl.CurrentCell.RowIndex, Me.PivotGridControl1.TableControl.CurrentCell.ColIndex, CellStyle, MyType)