Currently WorkGuru doesn't send transactions to Xero automatically.  As transactions are in the state to be sent to Xero, they will be added to the Xero queue in the Xero dashboard (Accounting -> Xero).  Transactions ready to send to Xero will be indicated by a count.   The status for a transaction to be added to the Xero queue is as follows:

Purchase Order
Invoiced  (Supplier invoice number and date)
PaymentsApplied (Payments can only be sent to Approved Invoices in Xero)
Credit NotesApproved
Stock TakeSaved
Stock AdjustmentSaved

Sending transactions to Xero is as simple as clicking the relevent send link.   If there is nothing to be sent to Xero, it will display the transaction is up to date.