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