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