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