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