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