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