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