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