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