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)(17,18,21,24)(19,26,28,23)(20,30,25,22)(27,29,31,32)(1,3,6,2)(4,8,5,7)(9,11,12,16)(10,13,14,15)(17,19)(18,23)(20,27)(21,28)(22,29)(24,26)(25,31)(30,32)(11,16)(13,15)(17,20,22,18,21,25,30,24)(19,27,29,23,28,31,32,26)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,19)(18,23)(20,27)(21,28)(22,29)(24,26)(25,31)(30,32)(1,5,6,4)(2,7,3,8)(19,28)(23,26)(27,31)(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.