There are several different ways of writing an outline, particularly for a work of fiction. If you have not been given a template or any other guidance, then you should include the details you think will be most useful to you in writing your essay from the ones suggested below.
One of the most common ways of writing an outline for a work of fiction is to use Freytag's Pyramid, or some variation on this structure. This means that you will begin with a few sentences of exposition, setting the scene, followed by the rising action, climax, falling action, and resolution. The majority of time and space is devoted to the rising action, and an outline should be highly structured, laid out in points (rather than in paragraphs, as a summary would be). The structure, therefore, would be something like this.
A few sentences introducing the setting and characters
Event 3, and so on
One sentence, describing the event
One or more events
One or two sentences on how the plot is resolved
Alternatively, you can organize the outline by writing a few lines about the setting, then the characters, and then the themes (identifying them rather than going into depth), followed by a sentence on the main events of each chapter.
One Day of Life, as the title suggests, takes place over the course of a single day—in fact, about twelve hours. It therefore lends itself to a simple chronological outline in either of the forms above.