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