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