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