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