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