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