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