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