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