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