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