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