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