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