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