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)(17,18,23,26,22,27,21,20)(19,25,29,28,30,24,32,31)(1,3)(2,5)(4,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,28)(21,32)(22,30)(23,29)(25,27)(26,31) involution — undirected(2,6)(3,7)(10,13)(14,15)(17,19)(18,25)(20,31)(21,32)(22,30)(23,29)(24,27)(26,28) involution — undirected(2,6)(5,8)(10,13)(14,15)(17,20,21,27,22,26,23,18)(19,28,32,25,30,31,29,24)(9,11,12,16)(10,14,13,15)(17,21,22,23)(18,26,27,20)(19,29,30,32)(24,28,25,31)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.