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