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