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