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