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