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