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