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