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