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