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)(19,27)(20,25)(21,29)(22,23)(24,28)(26,32)(30,31) involution — undirected(1,2)(3,6)(4,7)(5,8)(10,14)(11,15)(18,23)(20,31)(24,27)(26,29) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,13,15)(10,12,14,16)(18,23)(19,28)(25,30)(26,29)(1,2)(3,5)(4,7)(6,8)(9,12)(10,15)(11,14)(13,16)(17,19,22,28)(18,24,23,27)(20,26,31,29)(21,30,32,25)(1,3)(2,6)(4,8)(5,7)(17,20)(18,25)(19,29)(21,27)(22,31)(23,30)(24,32)(26,28) involution — undirected(1,2)(3,5)(4,7)(6,8)(17,21,22,32)(18,26,23,29)(19,30,28,25)(20,24,31,27)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.