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