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