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