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)(19,20)(21,29)(22,24)(23,25)(26,30)(27,31)(28,32) involution — undirected(3,8)(6,7)(11,15)(14,16)(17,19,22,25)(18,23,24,20)(21,27,30,32)(26,31,29,28)(1,3,5,8)(2,6,4,7)(9,10,13,12)(11,14,15,16)(18,24)(20,23)(21,30)(27,32)(3,8)(6,7)(17,20,22,23)(18,25,24,19)(21,28,30,31)(26,32,29,27)(1,3)(2,7)(4,6)(5,8)(9,11)(10,14)(12,16)(13,15)(17,18)(19,20)(21,26)(22,24)(23,25)(27,28)(29,30)(31,32) involution — undirected(1,4,5,2)(3,6,8,7)(9,12,13,10)(11,16,15,14)(17,21)(18,26)(19,27)(20,28)(22,30)(23,31)(24,29)(25,32)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.