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