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