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