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