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)(17,18)(19,22)(20,28)(21,23)(24,29)(25,27)(26,32)(30,31) involution — undirected(9,10,13,12)(11,14,16,15)(17,19)(18,22)(20,26)(21,27)(23,25)(24,30)(28,32)(29,31)(1,2,4,6)(3,5,8,7)(9,10,13,12)(11,15,16,14)(18,21)(19,25)(20,29)(30,32)(1,2)(3,5)(4,6)(7,8)(9,11,13,16)(10,14,12,15)(17,20,23,29)(18,24,21,28)(19,26,25,31)(22,30,27,32)(1,3)(2,5)(4,8)(6,7)(9,12,13,10)(11,15,16,14)(17,21,23,18)(19,27,25,22)(20,28,29,24)(26,32,31,30)(17,22,23,27)(18,19,21,25)(20,30,29,32)(24,26,28,31)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.