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