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