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