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