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