Detect direction of enemy with MoveTowards

Hi!, I'm using the MoveTowards function and is working just fine, but what I need to do is to capture the direction the enemy is moving, per example: If the enemy is moving towards the player in the "X axis" (horizontal) from "right-to-left" I want to associate that movement to a "-1" value, if it's moving from "left-to-right" use a "1" and the same with the "Y axis" (vertical). I need to do this to appropiate show the walking animations of the enemy. Any ideas of how could I retrieve this directions using the "MoveTowards" function?

 //moves towards player during X seconds and then pauses for Y seconds
     IEnumerator EnemyMovesTowardsPlayer()
     {        
         enemyWalking = true;
 
         if (enemyWalking)
         {            
             if (walkingTimer > 0)
             {
                 Debug.Log("Tiempo restante para andar = " + walkingTimer);
                 walkingTimer -= Time.deltaTime;
                 transform.position = Vector2.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
             }
             else
             {
                 enemyWalking = false;
                 Debug.Log("¿El enemigo esta andando? = " + enemyWalking);
                 yield return new WaitForSeconds (waitingTimer);
                 walkingTimer = walkingCoolDown;
             }
         }
     }