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)(19,25)(20,28)(21,24)(22,27)(23,29)(26,32)(30,31)(1,3,10,14,5,11,4,12)(2,6,13,16,8,15,7,9)(20,29)(22,31)(23,28)(27,30)(3,11)(6,15)(9,16)(12,14)(17,19,21,26)(18,22,24,31)(20,30,29,27)(23,32,28,25)(1,3,10,14,5,11,4,12)(2,6,13,16,8,15,7,9)(19,26)(22,31)(25,32)(27,30)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.