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