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