Drawing text across sphere in SceneKit

I just started out using SceneKit in my UIKit app with the aim of displaying and manipulating some 3D models. I need to show a sphere with some short text written across it. I am rendering the sphere like this:

let sphereGeometry = SCNSphere(radius: 1)
let sphereNode = SCNNode(geometry: sphereGeometry)
sphereNode.position = SCNVector3(x: -1, y: 0, z: 8)
sphereGeometry.firstMaterial?.diffuse.contents = UIColor.cyan

self.rootNode.addChildNode(sphereNode)

I tried using a CATextLayer to achieve what I need but I've had little luck. What is the proper way to do this?