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