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