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