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