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