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