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