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