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