One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,12,13)(11,14,16,15)(17,18)(19,24)(20,30)(21,26)(22,28)(23,27)(25,31)(29,32)(2,5)(6,7)(9,11)(10,14)(12,16)(13,15)(17,19,23,25)(18,24,27,31)(20,26,32,28)(21,29,22,30)(10,13)(11,15)(14,16)(17,20,22,31,23,32,21,24)(18,25,26,30,27,19,28,29)(1,3,4,8)(2,6,5,7)(17,21,23,22)(18,26,27,28)(19,29,25,30)(20,24,32,31)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.