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