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