I used the Categories Images plugin to add images to my attribute terms (pa_brands) and a custom template to create the actual page and add it in my menu.

<div class="row-flex">
   <?php foreach (get_terms('pa_brands') as $cat) : ?>
      <div class="child">
         <a href="<?php echo get_term_link($cat->slug, 'pa_brands'); ?>"><img src="<?php echo z_taxonomy_image_url($cat->term_id); ?>" /></a>
   <?php endforeach; ?>
.row-flex {

   display:flex; justify-content: center; align-items: center; flex-wrap: wrap; 

.child {
    width: 189px;
    height: 150px;
    margin: auto;
    align-self: flex-start;
    display: flex;
    align-items: center;