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