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