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