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)(11,12)(13,15)(14,16)(3,7)(5,8)(9,10,14,16)(11,12,13,15)(17,18)(19,25)(20,28)(21,22)(23,26)(24,29)(27,31)(30,32)(1,2)(3,5)(4,6)(7,8)(11,13)(12,15)(18,22)(19,26)(20,29)(31,32) involution — undirected(9,11,14,13)(10,15,16,12)(17,19)(18,23)(20,30)(21,26)(22,25)(24,32)(27,29)(28,31)(1,3,4,7)(2,5,6,8)(9,12,14,15)(10,11,16,13)(17,20)(18,24)(19,27)(21,29)(22,28)(23,31)(25,32)(26,30)(1,2)(3,5)(4,6)(7,8)(9,13,14,11)(10,15,16,12)(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.