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