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