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)(11,14)(12,16)(13,15)(17,18,21,20)(19,23,24,22)(25,26)(27,31)(28,30)(29,32)(2,4)(3,7)(9,11)(10,14)(12,15)(13,16)(17,18)(19,23)(20,21)(22,24)(25,26)(27,31)(28,30)(29,32) involution — undirected(2,4)(6,8)(10,15)(11,16)(18,20)(22,23)(25,26,28,30)(27,29,32,31)(1,3)(2,6)(4,8)(5,7)(9,11)(10,12)(13,16)(14,15)(17,19)(18,22)(20,23)(21,24)(25,26)(27,29)(28,30)(31,32) involution — undirected(1,4,5,2)(3,8,7,6)(9,12)(10,11)(13,14)(15,16)(17,20,21,18)(19,23,24,22)(25,27)(26,29)(28,32)(30,31)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.