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