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