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