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