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