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