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