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