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