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