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