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