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