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