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