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