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