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