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