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