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