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