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