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