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