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