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