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