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