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