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