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