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