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