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