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