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