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