How do I make a class diagram out of this use case diagram?

This is my use-case diagram

This is what how I've defined key classes so far:

Story

Attributes:

• storyID
• title
• content
• status (e.g., submitted, approved, rejected, archived)
• submissionDate

Methods:

• getStoryID()
• getTitle()
• getContent()
• getStatus()
• setStatus(status)

Journalist

Attributes:

• journalistID
• name
• email

Methods:

• submitStory(storyDetails)
• getJournalistID()
• getName()
• getEmail()

Editor

Attributes:

• editorID
• name

Methods:

• reviewStory(story)
• approveStory(story)
• rejectStory(story)

FileVerification

Attributes:-verificationStatus

Methods:

• verifyFile(story)
• ProcessingCenter

Methods:

• processApprovedStory(story)

System Class

Methods:

• validateInput(input)
• storeData(data)
• generateNotification(recipient, message)
• sendNotification(notification)

How do I make a class diagram out of this?