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