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