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