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