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