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