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