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