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