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