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