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