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