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