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