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