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