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