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