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