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