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