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