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