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