Based on the information you provided, it seems like your coworker was lost and sought your help to find her way. There might not be any significant hidden meaning behind this encounter.
If you're looking for a possible interpretation beyond the literal situation, it could be that your coworker trusts you and feels comfortable asking for your assistance. Alternatively, it could simply be a coincidence that you both happened to cross paths on the way to work.
In any case, offering your help and walking with her to her destination shows kindness and consideration, which are positive attributes in any workplace.