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