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