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