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