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