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