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