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