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