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