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