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