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