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)(19,25)(20,28)(21,23)(22,26)(24,29)(27,30)(31,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,16)(13,14)(18,23)(19,26)(20,29)(30,31) involution — undirected(2,6)(5,7)(10,14)(15,16)(17,19,25,18,21,26,22,23)(20,27,31,24,29,32,30,28)(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,20)(18,24)(19,27)(21,29)(22,30)(23,28)(25,31)(26,32)(3,8)(5,7)(9,12,13,11)(10,15,14,16)(20,29)(24,28)(27,32)(30,31)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.