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