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