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