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