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