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