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