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