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