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