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