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)(19,23)(20,30)(21,24)(22,26)(25,27)(28,32)(29,31)(2,6)(7,8)(17,19)(18,23)(20,28)(21,29)(22,27)(24,31)(25,26)(30,32) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,16)(18,24)(19,27)(20,29)(22,28)(23,30)(25,31)(1,3,5,4)(2,7,6,8)(9,11,12,15)(10,14,13,16)(17,20,21,27)(18,25,24,30)(19,28,29,22)(23,26,31,32)(1,4,5,3)(2,8,6,7)(19,20)(22,28)(23,30)(25,31)(26,32)(27,29)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.