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