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