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