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