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