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