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