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