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