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