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