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