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