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