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