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