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