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