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