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