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