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