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