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