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)(11,12)(13,14)(15,16)(17,18)(19,23)(20,24)(21,22)(26,31)(29,32) involution — undirected(2,5)(3,8)(10,14)(12,15)(17,18,21,22)(19,23,24,20)(25,26,30,31)(27,32,28,29)(3,8)(6,7)(10,14)(12,15)(18,22)(20,23)(25,27,30,28)(26,29,31,32)(1,2)(3,7)(4,5)(6,8)(9,11,13,16)(10,15,14,12)(17,19)(18,23)(20,22)(21,24)(25,28,30,27)(26,32,31,29)(1,3,4,8)(2,6,5,7)(9,12,13,15)(10,11,14,16)(17,20,21,23)(18,24,22,19)(25,29,30,32)(26,28,31,27)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.