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