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