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