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