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