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