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