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