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)(11,15)(12,16)(13,14)(17,18,23,26)(19,27,28,21)(20,30,25,22)(24,31,32,29)(2,6)(7,8)(10,14)(11,12)(17,19,22,29,23,28,30,31)(18,24,25,27,26,32,20,21)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,20,22,18,23,25,30,26)(19,21,29,24,28,27,31,32)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(17,21,23,27)(18,19,26,28)(20,31,25,29)(22,24,30,32)(9,12,13,11)(10,16,14,15)(19,28)(21,27)(24,32)(29,31)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.