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