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