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