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