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