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