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