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