One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,9,11,16)(4,13,10,7)(6,14,15,12)(17,18)(19,26)(20,30)(21,24)(22,25)(23,29)(27,28)(31,32)(1,3,10,14,5,11,4,12)(2,6,13,16,8,15,7,9)(17,18)(19,27)(20,24)(21,30)(22,25)(23,29)(26,28)(31,32)(3,11)(6,15)(9,16)(12,14)(17,19,20,29,22,28,21,31)(18,23,24,26,25,32,30,27)(1,3,10,14,5,11,4,12)(2,6,13,16,8,15,7,9)(19,28)(23,32)(26,27)(29,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.