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