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