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