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