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)(19,24)(20,22)(21,23)(26,29)(30,32) involution — undirected(3,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,20)(21,22)(23,24)(27,31)(30,32) involution — undirected(2,5)(6,8)(11,15)(14,16)(19,22)(20,24)(25,26,28,29)(27,30,31,32)(1,2)(3,6)(4,5)(7,8)(9,11,12,15)(10,14,13,16)(17,20,21,24)(18,22,23,19)(25,26)(27,30)(28,29)(31,32)(1,3,4,7)(2,6,5,8)(9,10)(11,16)(12,13)(14,15)(17,18)(19,20)(21,23)(22,24)(25,27,28,31)(26,30,29,32)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.