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