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