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