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