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