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