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