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