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