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