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