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