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