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