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