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