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