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