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