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