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