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