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