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)(17,18,23,26)(19,21,25,22)(20,28,31,27)(24,29,32,30)(1,3,5,14,6,11,4,13)(2,7,8,10,9,12,15,16)(17,19,22,18,23,25,21,26)(20,28,30,32,31,27,29,24)(3,11)(7,12)(10,16)(13,14)(17,20)(18,24)(19,27)(21,29)(22,30)(23,31)(25,28)(26,32) involution — undirected(1,2)(3,12)(4,15)(5,8)(6,9)(7,11)(10,13)(14,16)(17,21,23,22)(18,25,26,19)(20,29,31,30)(24,28,32,27)(1,4,6,5)(2,8,9,15)(3,13,11,14)(7,10,12,16)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.