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