In coming soon page you can only change the logo and background image. But the type which you are looking for you have to do this via CSS.
You can use this custom CSS
html.coming-soon .coming-soon-logo{
display:block !important;
margin: 0 auto !important;
}
html.coming-soon .coming-soon-title{
text-align: center;
}
html.coming-soon .coming-soon-content{
text-align: center;
}
html.coming-soon{
background-color: #7ba5f2;
}
html.coming-soon body{
background-color: #7ba5f2;
}
Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.