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