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)(17,18,22,25,21,26,19,23)(20,28,27,24,30,31,29,32)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19,21,22)(18,23,26,25)(20,29,30,27)(24,28,32,31)(9,11)(10,13)(12,16)(14,15)(17,20)(18,24)(19,27)(21,30)(22,29)(23,31)(25,28)(26,32) involution — undirected(3,8)(5,7)(11,16)(13,15)(17,19,21,22)(18,23,26,25)(20,29,30,27)(24,28,32,31)(10,14)(13,15)(17,19,21,22)(18,25,26,23)(20,27,30,29)(24,28,32,31)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.