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