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