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