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)(12,16)(13,14)(17,18)(19,29)(20,26)(21,24)(22,28)(23,27)(25,31)(30,32) involution — undirected(2,5)(6,8)(9,10)(11,16)(12,15)(13,14)(18,24)(19,20)(21,22)(25,29)(26,32)(27,28) involution — undirected(10,14)(15,16)(17,19)(18,25)(20,23)(21,31)(22,30)(24,26)(27,32)(28,29) involution — undirected(9,11,13,12)(10,15,14,16)(17,20,23,19)(18,26,27,29)(21,31,22,30)(24,25,28,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(18,27)(19,20)(24,28)(30,31)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.