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