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