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