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