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