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