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