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