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