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