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