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