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