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