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